Techniques and apparatus are disclosed for providing an aquarium. An aquarium includes a body that includes a rear wall. The aquarium body is shaped to form an opening at one end. The aquarium also includes an enclosure movably disposed over the opening of the body. The aquarium includes a connection device to connect the enclosure to the body and allow the enclosure to slide over the opening of the body so as to open and close the opening of the body. The connection device includes a support component that includes a vertical fitting component to mount to the rear wall of the body. The support component includes a shaft component disposed at one end of the vertical fitting part. The connection component includes a guide rail attached to the cover to slidably receive the shaft component so as to slide and rotate the cover with respect to the body.